Răspuns:
n=m : M ; n=nr.moli ; m=masa subst. ; M=masa molara
Explicație:
a.
VNH3=5moli. 22,4L/moli=112L
b.
n=51g : 17g/moli=3moli NH3
VNH3=3moli.22,4L /moli=67,2 L
C.
n= 12,046 .10²³ : 6,023.10²³=2moli NH3
VNH3=2moli.22,4L/moli=44,8L
MNH3=14 +3= 17----->17g/moli